JASN Express . Published on March 23, 2005 as doi: 10.1681/ASN.2004110997 Randomized, Controlled Trial of Topical Exit-Site Application of Honey (Medihoney) versus Mupirocin for the Prevention of Catheter-Associated Infections in Hemodialysis Patients
David Wayne Johnson, Carolyn van Eps, David William Mudge, Kathryn Joan Wiggins,Kirsty Armstrong, Carmel Mary Hawley, Scott Bryan Campbell, Nicole Maree Isbel,Graeme Robert Nimmo, and Harry GibbsDepartment of Renal Medicine, University of Queensland at Princess Alexandra Hospital, Brisbane, AustraliaThe clinical usefulness of hemodialysis catheters is limited by increased infectious morbidity and mortality. Topical antiseptic agents, such as mupirocin, are effective at reducing this risk but have been reported to select for antibiotic-resistant strains. The aim of the present study was to determine the efficacy and the safety of exit-site application of a standardized antibacterial honey versus mupirocin in preventing catheter-associated infections. A randomized, controlled trial was performed comparing the effect of thrice-weekly exit-site application of Medihoney versus mupirocin on infection rates in patients who were receiving hemodialysis via tunneled, cuffed central venous catheters. A total of 101 patients were enrolled. The incidences of catheter-associated bacteremias in honey-treated (n ؍ 51) and mupirocin-treated (n ؍ 50) patients were comparable (0.97 versus 0.85 episodes per 1000 catheter-days, respectively; NS). On Cox proportional hazards model analysis, the use of honey was not significantly associated with bacteremia-free survival (unadjusted hazard ratio, 0.94; 95% confidence interval, 0.27 to 3.24; P ؍ 0.92). No exit-site infections occurred. During the study period, 2% of staphylococcal isolates within the hospital were mupirocin resistant. Thrice-weekly application of standardized antibacterial honey to hemodialysis catheter exit sites was safe, cheap, and effective and resulted in a comparable rate of catheter-associated infection to that obtained with mupirocin (although the study was not adequately powered to assess therapeutic equivalence). The effectiveness of honey against antibiotic-resistant microorganisms and its low likelihood of selecting for further resistant strains suggest that this agent may represent a satisfactory alternative means of chemoprophylaxis in patients with central venous catheters. J Am Soc Nephrol 16: ???–???, 2005. doi: 10.1681/ASN.2004110997
C entralvenouscatheterizationisanestablishedmethodof siteinfection,andbacteremiacomparedwithnontunneledand
providing rapid, temporary access for the provision of
noncuffed devices (9–14). Recently, our group demonstrated that
hemodialysis to patients with serious acute or chronic
the topical application of 2% mupirocin ointment to the exit sites
renal failure. Unfortunately, the clinical usefulness of this method
of hemodialysis patients with tunneled, cuffed catheters engen-
is severely limited by the frequent occurrence of bloodstream
dered a further reduction in the rates of catheter-associated staph-
infections in up to 40% of cases (1–3). A number of registry (4,5)
ylococcal exit-site infection and bacteremia (3). Median infection-
and observational cohort studies (6) have indicated that there has
free survival time was increased from 55 to 108 d, such that one
been an increasing reliance on hemodialysis catheters in incident
episode of bacteremia was prevented for every 3.7 patients
hemodialysis patients ranging from 30% of patients in Europe and
treated. Unfortunately, a potentially significant disadvantage of
Australia to 60% in the United States. Recent studies have sug-
mupirocin chemoprophylaxis is the appearance of resistant staph-
gested further that the use of hemodialysis catheters is associated
ylococcal strains, which have been reported in a number of units
with a 1.5- to 3-fold increase in both all-cause and infectious
in other hospitals (15). It would clearly be ideal to develop an
mortality (4,7,8). A number of randomized, controlled trials have
alternative, safer strategy to mupirocin for preventing catheter-
demonstrated convincingly that tunneled, cuffed catheters are
associated infections without selecting further resistant strains.
associated with a much lower risk for bacterial colonization, exit-
A promising agent in this regard is honey. Honey has been
used from ancient times as a method of accelerating woundhealing (16) and is mentioned for healing purposes in the Bible,
Received November 24, 2004. Accepted February 11, 2005.
the Koran, and the Torah (17). Anecdotally, honey has been
Published online ahead of print. Publication date available at www.jasn.org.
claimed to reduce inflammation; debride necrotic tissue; reduce
Address correspondence to: Prof. David Johnson, Department of Renal Medicine,
edema; and promote angiogenesis, granulation, and epithelial-
Level 2, Ambulatory Renal and Transplant Services Building, Princess Alexandra
ization (18). More recently, there have been a number of reports
Hospital, Ipswich Road, Woolloongabba, Brisbane, Queensland 4102, Australia.
of honey being used successfully as a dressing for wounds,
Phone: ϩ61-7-3240-5080; Fax: ϩ61-7-3240-5480; E-mail: david_johnson@health. qld.gov.au
including burns, ulcers, infected surgical wounds, necrotizing
Copyright 2005 by the American Society of Nephrology
Journal of the American Society of Nephrology
soft tissue infections, meningococcal wounds, and abdominal
Central venous catheters were dedicated to hemodialysis use and were
wound dehiscence (17,19 –21). A meta-analysis of seven ran-
not accessed for other purposes. Subsequent catheter-site care was
domized, controlled trials involving the use of honey as a
performed by trained hemodialysis registered nurses using a rigorous
wound dressing showed it to be superior to antiseptics and/or
aseptic technique. Primapore dressings were changed thrice weekly ateach hemodialysis treatment, and the sites were recleansed with 10%
systemic antibiotics for wound healing, maintenance of steril-
povidone iodine solution, in accordance with the Kidney Disease Out-
ity, and eradication of infection (22).
comes Quality Initiative guidelines (27). Patients who were allocated to
In laboratory studies, some honeys have been shown to exert
the honey group additionally received approximately 3 ml of Medi-
an antimicrobial action against a broad spectrum of fungi and
honey applied to their exit sites with each dressing change. Patients
bacteria, including antibiotic-resistant bacteria such as methi-
who were allocated to the mupirocin group had mupirocin ointment
cillin-resistant Staphylococcus aureus, multidrug-resistant gram
applied to their exit sites with each dressing change according to
negative organisms, and vancomycin-resistant enterococci
standard unit protocols (approximately 10 mm of ointment was
(23,24). The reasons for this antibacterial activity include a
squeezed directly on to their exit sites from a 15-g tube with an outlet
relatively low water activity (0.56 to 0.59), low pH (3.2 to 4.5),
diameter of 5 mm with each dressing change). Patients were treated
the production of hydrogen peroxide on dilution (as a result of
with topical honey or mupirocin for the entire period that their catheter
the presence of the enzyme glucose oxidase), and phytochem-
remained in situ. At the completion of each hemodialysis treatment,sodium heparin (1000 U/ml) was injected into each lumen in a volume
ical components (including flavonoids and phenolic acids) (24).
equivalent to the priming volume of the catheter.
Despite a considerable accumulated experience of honey use in
At the time of inclusion in the study, demographic and clinical data
wound infections, antimicrobial resistance has not yet been
were recorded. Patients had their anterior nares cultured for S. aureus,
reported, thereby making it very attractive as a potential means
but identified nasal carriers were not treated. Patients were followed up
of antimicrobial prophylaxis (25). The aim of the present study
until the catheter was removed. The primary outcome measure was
was to determine the efficacy and the safety of topical exit-site
catheter-related bacteremia. Secondary outcome measures included
application of standardized antibacterial honey (Medihoney)
catheter exit-site infection and adverse reactions (including mupirocin
versus mupirocin in preventing infection secondary to tunneled,
resistance among staphylococcal isolates). Data were censored at the
time of catheter removal (when unrelated to catheter-associated infec-tion), death (when unrelated to catheter-associated infection), or theend of the study on October 4, 2004. Materials and Methods Study Population
All adult patients who had acute or chronic renal failure and re-
Catheter-related infections were defined according to standard
quired hemodialysis via a newly inserted tunneled, cuffed central
guidelines (9,28,29). Catheter-associated bacteremia was defined as ei-
venous catheter at the Princess Alexandra Hospital between February
ther (1) a single positive blood culture together with a positive culture
1, 2002, and July 28, 2004, were invited to participate in the study.
of the catheter tip or exit site with an identical organism or (2) two or
Informed consent was obtained from all patients before their inclusion
more positive blood cultures (or a single positive blood culture for S.
in the trial, and the study protocol was reviewed and approved by the
aureus) with no evidence of infection source other than the device.
Princess Alexandra Hospital Research Ethics Committee.
Exit-site infection was defined as purulent exit-site discharge or two ofthree of the following: Exit-site erythema, tenderness, and induration
The study was a prospective, open-label, randomized, controlled
trial. Patients who were enrolled in the study were randomly as-
signed to receive either topical ␥-irradiated, commercially available,
Exit-site swabs were obtained using sterile, premoistened calcium
pooled antibacterial honeys including Leptospermum sp honey (Medi-
alginate swabs in all suspected cases of catheter-associated infection.
honey; Medihoney Pty Ltd, Brisbane, Australia) or standard 2%
The swabs were streaked onto plates that contained blood agar, colis-
calcium mupirocin ointment (Bactroban; SmithKline Beecham Phar-
tin-nalidixic acid agar, McConkey’s media, and mannitol-salt agar. All
maceuticals, Sydney, Australia; mupirocin group) in addition to
cultures were incubated at 35°C for 48 h and examined daily for
standard exit-site care and 10% povidone iodine disinfection. The
growth. Patients with suspected bacteremia (fever Ͼ38°C, rigors, leu-
randomization was performed using sequentially numbered,
kocytosis, or clinically unwell) were investigated with exit-site swabs
opaque, sealed envelopes before catheter insertion. The sequence of
and at least two sets of blood cultures (20 ml). Staphylococcal isolates
interventions was obtained from a computer-generated random-
were screened routinely for mupirocin resistance by the disk suscepti-
number list with randomization blocks of 10.
bility method (30). The laboratory was blinded to the patient’s alloca-
All patients underwent ultrasound-guided placement of a subcuta-
neously tunneled, internal jugular venous hemodialysis catheter (Perm-
In cases of suspected catheter-associated bacteremia, the catheter was
Cath; Quinton Instrument Company, Seattle, WA) by dedicated vascu-
removed and the tip was sent for microbiologic culture. Approximately
lar access surgeons according to the method described by Schwab et al.
50 mm of catheter tip was rolled across chocolate agar plates and
(26). A prophylactic preoperative antibiotic (cephazolin 1 g intrave-
processed according to the semiquantitative method of Maki et al. (29).
nously) was prescribed in all cases. All catheters received 10% povi-
Catheter colonization was defined as the recovery of Ͼ15 colony-
done iodine disinfection at the site of insertion (contact time 3 to 5 min
followed by complete drying) and were covered by an opaque, air-permeable, nonwoven fabric dressing (Primapore, Smith & Nephew,
Sydney, Australia). Chest radiographs were obtained after insertion to
Normality of data was evaluated by the Kolmogorov-Smirnov test
confirm the position of the catheter tip in the superior vena cava.
with Lilliefor’s correction. Results are expressed as mean Ϯ SEM for
Medihoney versus Mupirocin for Dialysis Catheters
continuous parametric data, median (interquartile range) for continu-
ysis, the type of prophylaxis administered (honey or mupiro-
ous nonparametric data, and frequencies and percentages for categor-
cin) was not significantly associated with bacteremia-free sur-
ical data. Comparisons between the honey and mupirocin groups were
vival (unadjusted hazard ratio for honey, 0.94; 95% confidence
performed using t test or the Mann-Whitney U test, depending on data
interval, 0.27 to 3.24; P ϭ 0.92). Multivariate analysis did not
distribution. Differences in proportions were evaluated by 2 or Fisher
alter this finding (data not shown). No exit-site infections were
exact test. Infection-free survival curves, survival probabilities, and
observed in any patients during the period of the study.
estimated mean survival times were generated according to theKaplan-Meier method. Differences in the survival curves between thetwo groups were evaluated using the log rank test. A multivariate
Cox’s proportional hazards model was also applied, which included
Medihoney and mupirocin both were well tolerated. Tran-
allocated group, age, gender, race, body mass index, diabetic status,
sient, mild local skin discomfort was observed in one patient
ischemic heart disease, presence of infection at the time of randomiza-
who was treated with honey. This resolved within a few days
tion, nasal staphylococcal colonization, and serum albumin as covari-
despite continued administration of the agent. A similar tran-
ates. The proportional hazards assumption was checked both graphi-
sient local skin reaction associated with erythema was observed
cally and by hypothesis testing. Graphical examination was done using
in one patient who received topical mupirocin ointment. No
a log-cumulative hazard plot. The hypothesis test was carried out after
systemic adverse reactions to either honey or mupirocin oint-
generating Schoenfield and scaled Schoenfield residuals. All data were
ment were noted during the study period.
analyzed on an intention-to-treat basis using the statistical software
Mupirocin-resistant strains were not detected in any staphy-
package SPSS release version 10.0.5 (SPSS Inc., Chicago, IL). P Ͻ 0.05
lococcal isolates from study patients with catheter-associated
Prospective power calculations for the infection-free survival analy-
bacteremias. During the period of the trial, the proportion of
ses were performed using the software package PS version 1.0.17
staphylococcal isolates from all microbiologic specimens within
(Vanderbilt University Medical Center, Nashville, TN). It was esti-
the hospital that were mupirocin resistant was 2.0% (26 of 1328
mated prospectively that the study had adequate statistical power (80%
staphylococcal isolates). Approximately 70% of these mupiro-
probability) to detect at least a doubling in mean catheter-associated
cin-resistant isolates were identified in patients from the Renal
infection-free survival from a control (mupirocin) level of 320 d if 96
Unit, but none of these individuals was involved in the present
patients were recruited in the study (48 in each group), assuming an ␣
level of 0.05, accrual time of 730 d, and additional follow-up time after
The median cost of exit-site application for the average life of
a catheter was $13.00 AUD per patient in the honey group and$11.10 AUD per patient in the mupirocin group. Results Patient Characteristics Discussion
A total of 101 patients required insertion of tunneled, cuffed
The present study demonstrated that regular, thrice-weekly,
central venous catheters for the provision of hemodialysis at
topical exit-site application of standardized antibacterial honey
the Princess Alexandra Hospital between June 1, 2002, and July
was safe and cost-effective and resulted in a comparable rate of
31, 2004. All agreed to participate in the study, and none was
catheter-associated infection to that obtained with topical
lost to follow-up. No patients were excluded from the study.
mupirocin exit-site application in patients with tunneled,
Fifty-one patients were randomly allocated to the honey group,
cuffed hemodialysis catheters. To our knowledge, this is the
and 50 patients received mupirocin. There were no significant
first randomized, controlled trial to have examined the poten-
differences between the two groups with respect to their base-
tial utility of honey as an antimicrobial prophylactic agent.
line characteristics, except for a higher mean age and a trend
Moreover, the results of this study are potentially generalizable
toward a greater frequency of ischemic heart disease in the
to the prevention of infections associated with a number of
mupirocin group (Table 1). Median (interquartile range) fol-
prosthetic devices (e.g., central venous catheters, Hickman cath-
eters, Tenckhoff catheters, T-tubes, nephrostomy tubes).
Previous randomized, controlled trials have shown convinc-
ingly that, compared with placebo or no treatment, topical
Catheter-associated bacteremias occurred with similar fre-
mupirocin application was associated with a seven- to 13-fold
quencies in honey-treated (n ϭ 6, 12%) and mupirocin-treated
reduction in catheter-associated bacteremias in patients with
patients (n ϭ 5, 10%; P ϭ 0.78). The causes of bacteremia in the
either noncuffed, nontunneled (2) or tunneled, cuffed hemodi-
honey and mupirocin groups were S. aureus (1 or 17% versus 1
alysis catheters (3). Moreover, the observed rates of catheter-
or 20%), coagulase-negative staphylococci (2 or 33% versus 1 or
associated bacteremia in mupirocin-treated patients in those
20%), micrococcus (1 or 17% versus 0 or 0%), Serratia marcescens
studies (0.7 and 1.6 episodes per 1000 catheter days, respec-
(2 or 33% versus 0 or 0%), Klebsiella pneumoniae (0 or 0% versus
tively) were similar to those observed in the present investiga-
1 or 20%), and Stenotrophomonas maltophilia (0 or 0% versus 2 or
tion (0.85 episodes per 1000 catheter-days). However, since the
40%). The incidences of bacteremia in the two groups were 0.97
publication of these earlier investigations, there has been in-
and 0.85 episodes per 1000 catheter-days, respectively (NS).
creasing concern regarding the emergence of mupirocin-resis-
Mean Ϯ SE actuarial bacteremia-free survival periods were
tant staphylococci (31) and the potential for therapeutic failure
367 Ϯ 42 and 334 Ϯ 17 d, respectively (log rank 0.01, P ϭ 0.92;
(15). After introducing mupirocin chemoprophylaxis in our
Figure 1). On univariate Cox proportional hazards model anal-
own unit for the prevention of peritoneal dialysis and hemodi-
Journal of the American Society of Nephrology
Table 1. Baseline patient characteristics
alysis catheter infections, high-level mupirocin resistance has
Continued use of topical antimicrobial agents has provided
emerged, ranging between 2 and 6% of all staphylococcal iso-
the selective pressure that has led to the emergence of antibi-
lates. None of the isolates from patients in the present study
otic-resistant strains, which, in turn, has driven the continued
displayed mupirocin resistance, although this may have been
search for alternative, safer topical antiseptic agents with
due to the relatively small patient numbers and short duration
broad-spectrum antimicrobial activities. In this regard, stan-
of follow-up. Another group (32) has not observed an increase
dardized antibacterial honey seems to be a very promising
in high-level resistance after topical mupirocin administration,
candidate. Although mupirocin has been shown to be effective
but this finding is contradicted by several reports of disturbing
primarily against Gram-positive organisms, selected honeys
increases in resistance (to between 12.4 and 66% of staphylo-
have been found to be highly effective against fungi (including
coccal isolates) (31,33–35), particularly with widespread and
Aspergillus fumigatus, Aspergillus flavus, Penicillium citrinum,
prolonged mupirocin use (31). Furthermore, Perez-Fontan et al.Trichophyton rubrum, Trichophyton tonsurans, and Candida albi-
(34) observed a greater incidence of exit-site infections in pa-
cans), Gram-negative bacteria (including Escherichia coli, Kleb-
tients who were colonized with mupirocin-resistant S. aureussiella pneumoniae, Pseudomonas spp., Proteus mirabilus, Haemophi-
compared with those who were colonized with sensitive organ-
lus influenzae, Enterobacter cloacae, and Shigella dysenteriae), and
isms, suggesting that the development of mupirocin resistance
Gram-positive organisms (including streptococci, staphylo-
can have adverse clinical consequences.
cocci, enterococci, and clostridia) (18,22). The minimum inhib-
Medihoney versus Mupirocin for Dialysis Catheters
occasionally been reported to contain viable spores of Clostrid-ium botulinum (41).
The potential weaknesses of this trial were its open-label
design, the possibility of type 2 statistical error, and the lack ofstatistical power to confirm therapeutic equivalence of honeyand mupirocin. The absence of blinding could have potentiallyintroduced co-intervention and observer biases. For example,Wagman et al. (42) showed an eightfold higher rate of infectionsassociated with tunneled, cuffed catheters that were managedoutside study protocol compared with those that were man-aged using the technique required by the study. Such protocoldeviations were strictly avoided in the present study by ensur-ing that nursing staff adhered to a standardized exit-site careprotocol and carefully documented their actions at each dress-ing change. Moreover, observer bias was minimized by the useof clearly defined, objective outcome measures and by blindingto the patient’s study group assignment the microbiology lab-oratory staff who processed culture samples. As stated in theMaterials and Methods section, the study was adequately pow-ered to have detected a halving (or doubling) of risk in thehoney arm compared with the mupirocin arm. A smaller sig-nificant difference between the two groups could not be ex-
Figure 1. Catheter-associated bacteremia-free survival in honey-
cluded because of the possibility of a type 2 statistical error. In
and mupirocin-treated patients. The difference between the
particular, it is important to emphasize that the study lacked
groups was not statistically significant (log rank score 0.33, P ϭ
statistical power to have determined confidently that honey
0.87). The number of patients at risk within each group is
and mupirocin were therapeutically equivalent. Although the
indicated beneath the corresponding time periods on the x axis.
limits for establishing equivalence are arbitrary, to have had an80% probability of determining that the differences betweenhoney and mupirocin were no greater than 10% using the as-
itory concentrations of honey for all of these species were
sumptions of the original power calculations, a minimum of 4688
generally well below 10% vol/vol (18,22,24,36) and did not
patients in total would have been required. The results of the
seem to be appreciably different in antibiotic-resistant strains,
present trial therefore should be considered preliminary, such that
such as methicillin-resistant S. aureus, multidrug-resistant
much larger studies will be needed to confirm that honey offers
Gram-negative organisms, and vancomycin-resistant entero-
prophylactic efficacy that is equivalent to mupirocin.
cocci (18,24). The lack of significant variance in the sensitivity to
In conclusion, the present investigation demonstrated that
some honeys of a large number of isolates collected from a wide
the application of honey (Medihoney) to the exit sites of tun-
range of clinical settings contrasts markedly with the variations
neled, cuffed hemodialysis catheters was safe and effective
seen in antimicrobial sensitivities to antibiotics and strongly
compared with topical 2% calcium mupirocin, although our
suggests that there is no mechanism of resistance to the anti-
investigation did not have sufficient statistical power to con-
bacterial activity of honey (37). Indeed, despite a considerable
firm therapeutic equivalence. This study has potentially impor-
accumulated experience of honey use in wound infections,
tant implications for the treatment of hemodialysis patients
antimicrobial resistance has not yet been reported.
with temporary hemodialysis catheters and possibly for the
The mechanisms of action of honey have not been fully
treatment of patients with other types of catheters and pros-
elucidated, but hyperosmolality, acidity, hydrogen peroxide
thetic devices, who are at greatly increased risk for morbidity
generation, and phytochemical components (including fla-
and mortality from catheter-related sepsis. The finding that
vonoids and phenolic acids) have been considered to be impor-
honey administration to such patients is safe, inexpensive, un-
tant (17,36). The floral source of the honey also seems to be
likely to select for further antibiotic-resistant strains, and asso-
crucial, because some honeys (e.g., manuka honey from New
ciated with acceptably low catheter-related bacteremia rates
Zealand and a related Leptospermum honey from Australia) can
suggests that this agent may represent a satisfactory, alternative
be up to 100 times more active against microorganisms than
means of preventing hemodialysis catheter infections. Future
others (36). Honey has also been demonstrated to possess a
much larger trials are recommended to confirm the equivalence
number of additional advantages over conventional topical
of honey and mupirocin chemoprophylaxis.
antiseptics, including the promotion of wound healing (22),activation of lymphocytes and neutrophils (38), and the lack of
Acknowledgments
significant toxicity to human tissues (39). Sterilization of honey
The invaluable assistance of the nursing staff of the Princess Alex-
by ␥-irradiation does not cause loss of antimicrobial activity
andra Hospital Hemodialysis Unit is gratefully acknowledged. The
(40) but is recommended before clinical use because honey has
honey used in this trial was provided by Medihoney Pty Ltd.
Journal of the American Society of Nephrology
Contributors: Protocol development: D.W. Johnson, C.M. Hawley,
14. Keohane PP, Jones BJ, Attrill H, Cribb A, Northover J, Frost
S.B. Campbell, N.M. Isbel, G.R. Nimmo, and H. Gibbs; patient recruit-
P, Silk DB: Effect of catheter tunnelling and a nutrition
ment and management: D.W. Johnson, C. van Eps, D.W. Mudge, K.J.
nurse on catheter sepsis during parenteral nutrition. A
Wiggins, K. Armstrong, C.M. Hawley, S.B. Campbell, and N.M. Isbel;
controlled trial. Lancet 2: 1388 –1390, 1983
microbiologic studies: G.R. Nimmo; data analysis: D.W. Johnson, C.
15. Cookson BD, Lacey RW, Noble WC, Reeves DS, Wise R,
van Eps, D.W. Mudge, K.J. Wiggins, K. Armstrong, C.M. Hawley, S.B.
Redhead RJ: Mupirocin-resistant Staphylococcus aureus.
Campbell, N.M. Isbel, G.R. Nimmo, and H. Gibbs; manuscript prepa-
ration: D.W. Johnson, C. van Eps, D.W. Mudge, K.J. Wiggins, K. Arm-
16. Zumla A, Lulat A: Honey—A remedy rediscovered. J R Soc
strong, C.M. Hawley, S.B. Campbell, N.M. Isbel, G.R. Nimmo, and H.
17. Namias N: Honey in the management of infections. SurgInfect (Larchmt) 4: 219 –226, 2003
18. Efem SE, Udoh KT, Iwara CI: The antimicrobial spectrum
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Glossar Kokainbehandlungen Übersicht über den Stand der Behandlungen von kokainbedingten Störungen Rudolf Stohler, Dr. med., Psychiatrische Universitätsklinik Zürich Toni Berthel, Dr. med., Integrierte Psychiatrie Winterthur Michael Herzig, Ambulante Drogenhilfe/Heroingestützte Behandlung der Stadt Zürich Peter Burkhard, Die ALTERNATIVE, Ottenbach Thomas Meyer, Dr. me